Ratings and deployment context
The Siemens 3VA1025-3ED46-0KD0 is a 4-pole IEC circuit breaker on the 3VA1 frame, rated In=25 A with a fixed overload protection Ir=25 A and fixed short-circuit protection set at Ii=12.8 × In. The TM210 thermal-magnetic trip unit provides line protection; the FTFM designation indicates a fixed thermal and fixed magnetic setting, so no field adjustment of the trip curve is possible — the part ships with the settings locked at the factory. The breaker includes a factory-installed shunt trip accessory wired to the left side, rated 208–277 V AC 50/60 Hz and 220–250 V DC. This is the remote-trip coil, not an undervoltage release; it requires a sustained control voltage to hold the mechanism closed and trips the breaker when the control voltage is removed or interrupted. For panel integration, the neutral conductor is unprotected (solid neutral) and terminates via clamp connection — the same clamp style used on the phase poles.
The fixed-trip configuration and factory-fitted shunt trip mean the order code must match the BOM exactly — field conversion from a base breaker is not practical.